33851. Which of the following oil gasification processes is non-catalytic ?
33852. Dust content in raw blast furnace gas is about __________ gm/Nm3 , hence it is cleaned to the dust level of about < 10 mg /Nm3 before use.
33853. Ulrich’s International Periodical Directory is published by:
33854. Calorific value of coke oven gas is around __________ Kcal/Nm3.
33855. Highly caking coals
33856. Main use of hard coke produced by high temperature carbonisation is in the
33857. Hard pitch is used for making
33858. Supply of excess air for complete combustion of fuel is necessitated to facilitate
33859. Bomb calorimeter can be used to determine the __________ of the coal.
33860. Which of the following is a poisonous fuel gas?
33861. In low temperature carbonisation (as compared to high temperature carbonisation) of coal
33862. Washing of coal does not reduce its
33863. Coke having higher porosity has
33864. A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having
33865. Combustion of pulverised fuel
33866. Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
33867. Low temperature oxidation of coal during storage does not decrease its
33868. With increase in the oxygen content of the coal, its __________ decreases.
33869. The shift conversion reaction taking place during water gas manufacture is given by
33870. Which of the following is unsuitable fuel for producer gas manufacture ?
33871. A good metallurgical coke
33872. The main advantage of forced draft over natural draft is that
33873. Benzene is used
33874. The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.
33875. Net calorific value is the gross calorific value less the __________ heat of water in the product of combustion when cooled to 15°C.
33876. A ‘Classification and Subject Index for Cataloguing and arranging the books and pamphlets of a library’was the title of the first edition of:
33877. The optimum percentage of excess air for combustion depends upon the __________ of the fuel.
33878. Fuel for a nuclear reactor (thermal) is
33879. "Micum Index" of a coke is a measure of its
33880. 'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.
33881. Volatile matter content in coking coal may be about __________ percent.
33882. The main function of primary air in pulverised coal fired burner is to
33883. __________ is used as jet engine fuel.
33884. Fischer-Tropsch method aims at the
33885. To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in
33886. Artificial draught produced by a fan can be controlled by the
33887. Water gas constitutes mainly of
33888. Coke made in narrower by-product coke ovens (as compared to wider ovens) is
33889. Main constituent of the gas produced from a gobar gas plant is
33890. Steam is intermittently admitted into the fuel bed during the production of producer gas to
33891. In general, the limit of inflammability/explosion limit of fuel gases is widened by the
33892. Caking coal is desirable for
33893. Blast furnace gas compared to coke oven gas has
33894. Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature ?
33895. Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the
33896. Washing of coal is done to reduce the
33897. Volumetric ratio of N2 to O2 in dry atmospheric air is
33898. Coke oven gas burns with an yellowish flame, because of the presence of
33899. Calorific value of
33900. Which of the following would require least amount of secondary air for combustion ?
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